Topics include religion, making his daughter cry with Ukulele Songs, and the bad influence of the Disney Channel. Having not read the interview myself, I'm forced to send you to Alternative Nation for pieces of the interview.
If you want to check it out, all proceeds from book sales benefit 826 National, an organization focused on helping students, ages 6–18, with expository and creative writing. 826 National is a past beneficiary of the Vitalogy Foundation.
If you can't be bothered, check out Apatow's interview with the bad on YouTube.